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    <title>html5 programming</title>
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<body>
    <p>html5 programming,i love it</p>
    <p>html5 programming,i love it</p>
    <p>html5 programming,i love it</p>

    <details>
        html5 programming,i love programming
    </details>
    <details>
        <summary>
            html5
        </summary>
        html5 programming,i love programming
    </details>
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